Wrench.



No. 801,919. PATENTBD OCT. 1'7, 1905. H. B. SCHILLER.

WRENCH.

APPLICATION FILED MAILS, 1905.

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Specification of Letters Eatent.

Patented Got. 17, 1905.

Application iled March 3, 1905. Serial No. 248,196.

T0 all whom, it 'may concern;

Be it known that I, HARIY B. SCHILLER, a citizen of the United States,and a resident of the city of Philadelphia, State of Pennsylvania, haveinvented certain new and useful Improvements in /Vrenches, of which thefollowing is a full, clear, and complete disclosure.

An object of my invention is to produce a wrench having an adjustablejaw to enable the same to be adapted to different sizes of nuts, bolts,&c., said jaw being provided with means which allow it to be quickly andeasily adjusted, and when so adjusted the jaws will be held firmly andrigidly in position without any tendency to slide or become distorted.

A further object of my invention is to simplify the structural parts, sothat the liability of the same to break is reduced to a minimum and sothat the cost of manufacture is made as low as possible. For a full,clear, and exact description of this form of my invention reference maybe had to the following specification and to the accompanying drawings,forming a part thereof, in which- K Figure l is a perspective view of myimproved wrench. Fig. 2 is a longitudinal sectional view thereof, takenthrough the movable or adjustable jaw; and Fig. 3 is a sectional viewtaken substantially upon the line 3 3. Fig. 2.

Referring to the drawings, the numeral 1 indicates a shank or handlewhich is provided at one end with a fixed jaw 2, extending atsubstantially right angles to the shank 1 in the usual manner. 'Iheseparts are preferably made integral with each other, and the shank l isof substantially the same thickness throughout, but varies slightly inwidth from the upper end A to the lower end B, where it is slightlywider. The variation in width of the handle or shank l is about onethirtysecond of an inch for a wrench having a shank six inches long, or,in other words, the difference in width is about one-sixteenth of aninch to a foot.

The movable jaw 3 is provided with the usual slot or opening 4., and theprojecting portion of the jaw 3 opposite the jaw 2 is provided with asocket or recess 5, which is provided with an inclined inner wall, thesaid wall and shank or handle converging toward each other as theyextend away from the face of the jaw, as indicated at 6. The inclinationof the inner wall of the socket is preferably about one-eighth of aninch for a jaw one inch and a half wide, but may be made more or less,according to special design and use. The side walls of the recess 5 arepreferably parallel, and the lower end of the recess is preferably notprovided with any integral or fixed wall, as indicated at 7. Within therecess 5 is placed a wedge-shaped or tapering block 8, which is adaptedto slide easily therein between the parallel side walls of the recess.The block 8 is provided with a screw-threaded hole 9, which is engagedby a thumb-screw 10, said thumb-screw preferably having' a slidablecross-bar or lever Il, which passes through an opening in the head ofsaid screw. When the lower end of the recess is not provided with anintegral or permanent wall, I attach a bearing-plate 12, against whichthe head of the screw 9 is adapted to rest and when said screw istightened will cause the block or wedge 8 to be drawn outwardly towardsaid plate.

It will be noted that the surfaces of the shank are smooth and have noserrations or corrugations by which the movable jaw 3 is held inposition, said movable jaw being held entirely by friction, therebyobviating the necessity of disengaging the teeth of such serrations orcorrugations when it is desired to adjust the jaws of the wrench. Itwill also be noted that when pressure is brought to bear upon the jaw 3any slight movement of said jaw, should the screw IO not be suiiicientlytightened, would tend to more firmly wedge the block 8 against the shankI, and thereby prevent said jaw. from having further movement.

By making the taper of the shank and the taper of the recess in oppositedirections any motion of the block 8 away from the jaw has immediately awedging effect on both sides against the inner wall of the recess andagainst the shank, thus enabling the jaw to be quickly and securelyclamped in any position. Moreover, by drawing the block outwardly away-from the clamping-jaw I am enabled to use asmaller screw than would benecessary if it were used to thrust the block forward and to use anordinary plain machine-screw instead of a specially-shaped screw withabutting collars or shoulders. My construction, therefore, combines aquick adjustment, a light construction, and a secure binding of the jawto the shank or handle.

I am aware that wrenches have heretofore been made which involve the useof a tapering shank, and I am also aware that wrenches h ave heretoforebeen made involving the use of a wedge or taperlng block for holding themov- IOO IIO

' struction herein set forth I believe to be entirely original with me,and

Therefore, what I claim, and desire to protect by Letters Patent of theUnited States, 1s-- 1. An adjustable wrench having a shank or handle,the edges of which converge toward the [ixed jaw on the extremitythereof, a movable jaw located upon said shank or handle, said jaw beingprovided with a tapering wedged-shaped groove or recess, the taper ofwhich is toward the said shank in a direction away from the face of thejaw, a tapering or wedged -shaped block located within said groove orrecess, and a means for drawing said block toward the small end of saidrecess.

2. An adjustable wrench having a plain shank or handle, the plain edgesof which converge toward the fixed jaw on the extremity thereof, amovable jaw located upon said shank, said movable jaw being providedwith a tapering or wed ged-shaped groove or recess, the tapering side ofwhich converges toward said shank in a direction away from the facevided with a tapering or wedged-shaped openended groove or recess, theinclined side of which converges toward the shank in a direction awayfrom the face of the said jaw, a plain tapering or wedged-shaped blockfitted within said recess, and adapted to bear against said shank, aplate adapted to close the end of said slot or recess and a screwpassing through said plate 'for drawing said block outwardly toward thesmaller end of said recess.

In witness whereofl I have hereunto set my hand this lst day of March,1905.

HARRY B. SCHILLER.

Witnesses:

ALEXANDER PARK, HARRY COBB KENNEDY.

